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Absence of pure quadrupole ordering in SmSn$$_3$$; Dipole-dipole and quadrupole-quadrupole interactions in Sm-based compounds

Ito, Takashi; Higemoto, Wataru; Ninomiya, Kazuhiko; Suzuki, Hiroyuki*

The intermetallic cubic compound SmSn$$_3$$ is currently the only candidate for pure quadrupole ordering among existing Sm-based compounds. In this paper, we report on magnetic susceptibility and muon spin relaxation measurements on SmSn$$_3$$ and demonstrate that a spontaneous local magnetic field appears in the ordered state, which undoubtedly rules out the pure quadrupole ordering. Dipole-dipole and quadrupole-quadrupole interactions in trivalent lanthanide systems are discussed on the basis of a de Gennes theory, indicating that the former tends to dominate in Sm intermetallics. This also provides a general guideline for future searches of quadrupole-related phenomena in trivalent lanthanide systems.

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Category:Materials Science, Multidisciplinary

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